\begin{table}%t4
\caption{\label{galintensity}Measured central $^{12}$CO and $^{13}$CO line intensities.}
%\centerline
{
\small\begin{tabular}{lccccccccccc}
\hline \hline 
    & Beam 
    & \multicolumn{2}{l}{NGC~278} 
    & \multicolumn{2}{l}{NGC~660} 
    & \multicolumn{2}{l}{NGC~3628} 
    & \multicolumn{2}{l}{NGC~4631} 
    & \multicolumn{2}{l}{NGC~4666}\\ 
& size 
& $T_{\rm mb}$ & $\int T_{\rm mb}$d$V$ 
& $T_{\rm mb}$ & $\int T_{\rm mb}$d$V$ 
& $T_{\rm mb}$ & $\int T_{\rm mb}$d$V$ 
& $T_{\rm mb}$ & $\int T_{\rm mb}$d$V$ 
& $T_{\rm mb}$ & $\int T_{\rm mb}$d$V$ \\ 
& ($\arcsec$) 
& (mK) & ($\kkms$) 
& (mK) &($\kkms$) 
& (mK) & ($\kkms$) 
& (mK) &($\kkms$) 
& (mK) & ($\kkms$) \\ 
\hline
$\co$ \\
$J=1{-}0$ & 22     & 595 & 21~$\pm$~2 &  635 & 163~$\pm$~16 & 980 & 211~$\pm$~25 & 550 & 45~$\pm$~6 & 395 & 77~$\pm$~9 \\ 
$J=2{-}1$ & 12     & 755 & 26~$\pm$~3 & 1377 & 352~$\pm$~35 &1420 & 207~$\pm$~25 & 600 & 45~$\pm$~6 & 505 & 74~$\pm$~9 \\ 
        & 21     & 393 & 16~$\pm$~2 &  516 & 137~$\pm$~14 & 710 & 151~$\pm$~18 & 390 & 26~$\pm$~3 & 320 & 54~$\pm$~6 \\ 
        &{\it 43}& --- & 14~$\pm$~2 &  --- &  62~$\pm$~8  & --- & 71~$\pm$~9   & --- & 21~$\pm$~3 & --- & 27~$\pm$~3 \\ 
$J=3{-}2$ & 14     & 414 & 15~$\pm$~2 &  490 & 164~$\pm$~19 & 860 & 163~$\pm$~20 & 280 & 22~$\pm$~3 & 315 & 51~$\pm$~6 \\ 
        &{\it 21}& --- & 13~$\pm$~2 &  --- &  94~$\pm$~11 & --- & 130~$\pm$~15 & --- & 17~$\pm$~2 & --- & 37~$\pm$~4 \\ 
$J=4{-}3$ & 11     & 310 & 15~$\pm$~2 &  565 & 161~$\pm$~16 & 930 & 176~$\pm$~21 & 250 & 19~$\pm$~2 & 150 & 28~$\pm$~5 \\ 
        &{\it 14}& --- & 11~$\pm$~1 &  --- & 122~$\pm$~14 & --- & 140~$\pm$~17 & --- & 14~$\pm$~2 & --- & 23~$\pm$~3 \\ 
        &{\it 21}& --- &  9~$\pm$~1 &  --- &  92~$\pm$~11 & --- &  98~$\pm$~12 & --- & ---      & --- & 16~$\pm$~2 \\ 
\hline
$\treizeco$\\
$J=1{-}0$ & 21 &  68 &2.5~$\pm$~0.3& 34  & 10.4~$\pm$~1 & 72  &17.1~$\pm$~2.0& 40  &3.45~$\pm$~0.38&40& 8.8~$\pm$~1.0 \\ 
$J=2{-}1$ & 12 &  64 &2.7~$\pm$~0.3& 66  & 18.7~$\pm$~2 & 82  &20.9~$\pm$~2.5& 60  &3.75~$\pm$~0.45&40&11.3~$\pm$~1.3 \\ 
        & 21 &  77 &1.9~$\pm$~0.3& 44  & 11.4~$\pm$~1 & 46  &13.6~$\pm$~1.7& 20  &1.20~$\pm$~0.14&30& 8.1~$\pm$~0.8 \\ 
$J=3{-}2$ & 14 &  55 &1.3~$\pm$~0.2& 32  & 12.9~$\pm$~1 & 77  &20.6~$\pm$~2.5& --- & ---         &25& 4.5~$\pm$~0.6 \\ 
\hline
\end{tabular}}
\end{table}